package com.wwzh.interview.study.thread;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

class ShareResource{
    private int number = 1; // A:1 B:2 C:3
    private Lock lock = new ReentrantLock();
    private Condition c1 = lock.newCondition();
    private Condition c2 = lock.newCondition();
    private Condition c3 = lock.newCondition();
    public void print1(){
        lock.lock();
        try {
            while (number!=1){
                c1.await();
            }
            for (int i = 1; i < 5; i++) {
                System.out.println(Thread.currentThread().getName()+"\t " +i);
            }
            number = 2;
            c2.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }

    public void print2(){
        lock.lock();
        try {
            while (number!=2){
                c2.await();
            }
            for (int i = 1; i < 5; i++) {
                System.out.println(Thread.currentThread().getName()+"\t " +i);
            }
            number = 3;
            c3.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }

    public void print3(){
        lock.lock();
        try {
            while (number!=3){
                c3.await();
            }
            for (int i = 1; i < 5; i++) {
                System.out.println(Thread.currentThread().getName()+"\t " +i);
            }
            number = 1;
            c1.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }

    public synchronized void print11(){
        try {
            while (number!=1){
                wait();
            }
            System.out.println(Thread.currentThread().getName()+"\t " );

            number = 2;
            notifyAll();
        }catch (Exception e){
            e.printStackTrace();
        }
    }
    public synchronized void print22(){
        try {
            while (number!=2){
                wait();
            }
            System.out.println(Thread.currentThread().getName()+"\t " );

            number = 3;
            notifyAll();
        }catch (Exception e){
            e.printStackTrace();
        }
    }public synchronized void print33(){
        try {
            while (number!=3){
                wait();
            }
                System.out.println(Thread.currentThread().getName()+"\t " );
            number = 1;
            notifyAll();
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}

public class SyneAndReentrantLockDemo {
    public static void main(String[] args) {
        ShareResource shareResource = new ShareResource();
        /*new Thread(()->{
            for (int i = 1; i < 10; i++) {
                shareResource.print1();
            }
        },"AA").start();
        new Thread(()->{
            for (int i = 1; i < 10; i++) {
                shareResource.print2();
            }
        },"BB").start();
        new Thread(()->{
            for (int i = 1; i < 10; i++) {
                shareResource.print3();
            }
        },"CC").start();*/

        new Thread(()->{
            for (int i = 1; i < 10; i++) {
                shareResource.print11();
            }
        },"AA").start();
        new Thread(()->{
            for (int i = 1; i < 10; i++) {
                shareResource.print22();
            }
        },"BB").start();
        new Thread(()->{
            for (int i = 1; i < 10; i++) {
                shareResource.print33();
            }
        },"CC").start();
    }
}
